The reason why GPS leveling cant be used for height transfer across obstacle is that the height datum of both sides of obstacle is not consistent.
GPS水准无法直接应用于跨障碍高程传递，其关键原因在于障碍物两侧的高程基准不一致。
The results show that GPS astronomical leveling is an effective method for height transfer across obstacle at a long distance with high precision.
研究结果表明：天文GPS水准方法是一种远距离、高精度跨障碍高程传递方法。
The study and experimentation based on the above thought show that GPS astronomical leveling is an effective and high precision method for height transfer across obstacle with long distance.
根据以上设想进行的研究试验表明，“天文GPS水准”克服了单纯GPS水准无法连接不同高程系统的困难，对于远距离跨障碍高程传递是一种有效的高精度方法。
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